<template>
    <div class="backtopOne">
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>
        <div>this is backtopTwo</div>

    </div>
</template>
<script>
export default {
    
}
</script>
<style>
    .backtopOne>div{
        width: 100%;
        height: 40px;
        line-height: 40px;
        text-align: center;
    }
    .backtopOne>div:nth-child(2n){
        background: #ccc
    }
</style>